Source classification is not directly visible to operators but can be inferred from citation patterns. A source consistently cited for specific query types has been classified for those query types. A source cited rarely or only for narrow query types has a more limited classification.
IEO Engine deployments are explicitly architected to support broad source classification — not just answering specific questions but functioning as canonical references for entire topical areas. This produces citation availability across query variations rather than narrow citation for specific question phrasings.